expanding a Jtree...

[6e]

I am trying to expand a Jtree to the newly added node... however I
can't seem to make it happen.

I've tried a number of things which I listed below, all of these were
tried seperately and together, however the Jtree still does not expand


I also tried to use invalidate and repaint and validate to refresh the
screen, nothing seems to happen...

this is what I have tried so far...

this.fireTreeExpanded(new TreePath(mtnNode.getPath()));

this.expandPath(new TreePath(parentNode.getPath()));

this.scrollPathToVisible(new TreePath(mtnNode.getPath()));

any ideas?

 

[Branko Kaucic]

I am trying to expand a Jtree to the newly added node... however I
can't seem to make it happen.

I've tried a number of things which I listed below, all of these were
tried seperately and together, however the Jtree still does not expand


I also tried to use invalidate and repaint and validate to refresh the
screen, nothing seems to happen...

this is what I have tried so far...

this.fireTreeExpanded(new TreePath(mtnNode.getPath()));

this.expandPath(new TreePath(parentNode.getPath()));

this.scrollPathToVisible(new TreePath(mtnNode.getPath()));

any ideas?

See the lines below, they will help you. Let treeMenu be of type JTree.

// you will need this when you access children nodes
TreeModel TM = treeMenu.getModel();

// path to current selected node
TreePath TP = treeMenu.getSelectionPath();

// object of last selected node
Object O1 = TP.getLastPathComponent();

// first children of O1
Object O2 = TM.getChild(O1, 0);

// full path to some children inside node that is represented with TP
TreePath TP2 = TP.pathByAddingChild(O2);

// select the node that is represented by path TP2
treeMenu.setSelectionPath(TP2);

// expand selected row
int[] Rows = panelMenu.treeMenu.getSelectionRows();
panelMenu.treeMenu.expandRow(Rows[0]);

Note that you also have expandPath(TreePath) method.

B.

 

[Roedy Green]

I also tried to use invalidate and repaint and validate to refresh the
screen, nothing seems to happen...

Perhaps you have tied up the event thread so that it can't process the
events. Without code all people can do is guess.

See http://mindprod.com/jgloss/swingthreads.html